note: dum_in19 omitted because of collinearity
note: dum_in20 omitted because of collinearity
note: dum_in21 omitted because of collinearity
Iteration 0: log pseudolikelihood = -1398.6116
Iteration 1: log pseudolikelihood = -1343.6895
Iteration 2: log pseudolikelihood = -1343.2777
Iteration 3: log pseudolikelihood = -1343.2769
Iteration 4: log pseudolikelihood = -1343.2769
Probit regression Number of obs = 2033
Wald chi2(20) = 103.78
Prob > chi2 = 0.0000
Log pseudolikelihood = -1343.2769 Pseudo R2 = 0.0396
------------------------------------------------------------------------------
| Robust
pin_d | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
IM | .0349286 .0152563 2.29 0.022 .0050268 .0648305
EX | -.0012979 .0094316 -0.14 0.891 -.0197835 .0171878
dum_in1 | .3935336 .2281809 1.72 0.085 -.0536927 .8407599
dum_in2 | -.1814786 .1931936 -0.94 0.348 -.5601311 .1971739
dum_in3 | -.8520875 .2908348 -2.93 0.003 -1.422113 -.2820617
dum_in4 | -.3617536 .3291265 -1.10 0.272 -1.00683 .2833224
dum_in5 | -.30975 .371427 -0.83 0.404 -1.037734 .4182336
dum_in6 | .023996 .2554818 0.09 0.925 -.4767391 .5247311
dum_in7 | -.7105277 .2728539 -2.60 0.009 -1.245312 -.1757438
dum_in8 | -.814368 .4685178 -1.74 0.082 -1.732646 .10391
dum_in9 | .6191057 .159261 3.89 0.000 .3069599 .9312515
dum_in10 | -.1450727 .1555843 -0.93 0.351 -.4500123 .1598668
dum_in11 | -.8040283 .2403151 -3.35 0.001 -1.275037 -.3330194
dum_in12 | -.0513121 .1577078 -0.33 0.745 -.3604136 .2577895
dum_in13 | -.4206497 .1749261 -2.40 0.016 -.7634986 -.0778008
dum_in14 | .1663208 .1108897 1.50 0.134 -.051019 .3836606
dum_in15 | .3416866 .3147164 1.09 0.278 -.2751462 .9585193
dum_in16 | -.0610019 .1786916 -0.34 0.733 -.411231 .2892272
dum_in17 | .1709796 .1179171 1.45 0.147 -.0601337 .4020929
dum_in18 | .7371363 .1860433 3.96 0.000 .3724982 1.101774
dum_in19 | (omitted)
dum_in20 | (omitted)
dum_in21 | (omitted)
_cons | -.4243642 .2272548 -1.87 0.062 -.8697753 .021047
------------------------------------------------------------------------------
.
这个结果是设置21个行业虚拟变量, 并保留截距, stata 自动删除三个行业虚拟变量 的结果.
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